Concept explainers
To determine:
Which baby belongs to which couple by using the given information?
Concept introduction:
The ABO blood group is determined by three alleles of gene I:
If gene I encodes for both molecule A and B, it give rise to blood group type AB (genotype
Explanation of Solution
Tabular representation:
Table 1: Cross between father with genotype
Table 2: Cross between father with genotype
Table 3: Cross between father and mother with genotype
Table 4: Cross between father and mother with genotype
Table 5: Cross between one parent with genotype
Table 6: Cross between father with genotype ii and mother with genotype
Table 7: Cross between father with genotype ii and mother with genotype
Couple 1: Father with B blood type (genotype
If the father has genotype
If the father has genotype
Thus, couple 1 could produce children with blood type A, B or AB.
Couple 2: Father have blood type A and mother have blood type A. Both could have genotypes
If both father and mother have genotype
If both father and mother have genotype
If one parent have genotype
Thus, couple 2 could produce children with blood type A, or O.
Couple 3: Father with blood type O (genotype ii) and mother with blood type B (genotype
If father has genotype ii and mother has genotype
If father has genotype ii and mother has genotype
Thus, couple 3 could produce children with blood type B, or O.
According to the given information:
Baby X has blood type B.
Baby Y has blood type AB.
Baby Z has blood type O.
As only couple 1 could produce children with blood type AB, so baby Y belongs to couple 1.
As only couple 3 could produce children with blood type B, so baby X belongs to couple 3.
As couple 2 could produce children with blood type O, so baby Z belongs to couple 2.
Baby X belongs to Jordan and Taylor, baby Y belongs to Logan and Leslie and baby Z belongs to Sam and Casey.
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Chapter 10 Solutions
BIOLOGY 101 TIDEWATER CC -W/ACCESS >IC
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